mootools slideIn implementation for keyboard users

an example of a better way to implement a "more options" type panel using the mootools javascript framework's Fx.Slide functions, while avoiding the issue of keyboard users being forced to tab through off-screen links when the panel is not visible.

the solution involves actually removing the panel from the DOM via display:none when a slideOut function has completed, and setting display:block before initiating any slide effect.

more options

some bogus links to test the effect on keyboard navigation when the panel's state is changed.